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A240193 as a simple table

n a(n)
1 3
2 12
3 37
4 129
5 478
6 1908
7 7868
8 32888
9 138292
10 583040
11 2461028
12 10393720
13 43907108
14 185502448
15 783769556
16 3311604104
17 13992449972
18 59122342816
19 249810507844
20 1055529401752
21 4459952527044
22 18844744947024
23 79625166220340

[3,12,37,129,478,1908,7868,32888,138292,583040,
 2461028,10393720,43907108,185502448,783769556,
 3311604104,13992449972,59122342816,249810507844,
 1055529401752,4459952527044,18844744947024,
 79625166220340]

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)